You can always download the newest version number of each product from this web site. In general, you can simply run the new installer to upgrade over the old copy, automatically preserving your settings.
In some cases it may be necessary to uninstall the old version first, or to reboot services or the machine afterward. The installer will tell you if any of these things are required.
If you have any questions about updating, please don't hesitate to open a support request for assistance.